内容

• 特性
• 详细描述

PinchEvent QML Type

For specifying information about a pinch event 更多...

导入语句：

import QtQuick 2.7

• 所有成员列表，包括继承成员

特性

• accepted : bool
• angle : real
• center : QPointF
• point1 : QPointF
• point2 : QPointF
• pointCount : int
• previousAngle : real
• previousCenter : QPointF
• previousScale : real
• rotation : real
• scale : real
• startCenter : QPointF
• startPoint1 : QPointF
• startPoint2 : QPointF

详细描述

PinchEvent type was added in QtQuick 1.1

center , startCenter , previousCenter properties provide the center position between the two touch points.

scale and previousScale properties provide the scale factor.

angle , previousAngle and rotation properties provide the angle between the two points and the amount of rotation.

point1 , point2 , startPoint1 , startPoint2 properties provide the positions of the touch points.

accepted property may be set to false in the onPinchStarted handler if the gesture should not be handled.

另请参阅 PinchArea .

特性文档编制

accepted : bool

Setting this property to false in the PinchArea::onPinchStarted handler will result in no further pinch events being generated, and the gesture ignored.

angle : real

These properties hold the angle between the two touch points.

• angle is the current angle between the two points in the range -180 to 180.
• previousAngle is the angle of the previous event.
• rotation is the total rotation since the pinch gesture started.

When a pinch gesture is started, the rotation is 0.0 .

center : QPointF

These properties hold the position of the center point between the two touch points.

• center is the current center point
• previousCenter is the center point of the previous event.
• startCenter is the center point when the gesture began

point1 : QPointF

These properties provide the actual touch points generating the pinch.

• point1 and point2 hold the current positions of the points.
• startPoint1 and startPoint2 hold the positions of the points when the second point was touched.

point2 : QPointF

These properties provide the actual touch points generating the pinch.

• point1 and point2 hold the current positions of the points.
• startPoint1 and startPoint2 hold the positions of the points when the second point was touched.

pointCount : int

Holds the number of points currently touched. The PinchArea will not react until two touch points have initited a gesture, but will remain active until all touch points have been released.

previousAngle : real

These properties hold the angle between the two touch points.

• angle is the current angle between the two points in the range -180 to 180.
• previousAngle is the angle of the previous event.
• rotation is the total rotation since the pinch gesture started.

When a pinch gesture is started, the rotation is 0.0 .

previousCenter : QPointF

These properties hold the position of the center point between the two touch points.

• center is the current center point
• previousCenter is the center point of the previous event.
• startCenter is the center point when the gesture began

previousScale : real

These properties hold the scale factor determined by the change in distance between the two touch points.

• scale is the current scale factor.
• previousScale is the scale factor of the previous event.

When a pinch gesture is started, the scale is 1.0 .

rotation : real

These properties hold the angle between the two touch points.

• angle is the current angle between the two points in the range -180 to 180.
• previousAngle is the angle of the previous event.
• rotation is the total rotation since the pinch gesture started.

When a pinch gesture is started, the rotation is 0.0 .

scale : real

These properties hold the scale factor determined by the change in distance between the two touch points.

• scale is the current scale factor.
• previousScale is the scale factor of the previous event.

When a pinch gesture is started, the scale is 1.0 .

startCenter : QPointF

These properties hold the position of the center point between the two touch points.

• center is the current center point
• previousCenter is the center point of the previous event.
• startCenter is the center point when the gesture began

startPoint1 : QPointF

These properties provide the actual touch points generating the pinch.

• point1 and point2 hold the current positions of the points.
• startPoint1 and startPoint2 hold the positions of the points when the second point was touched.

startPoint2 : QPointF

These properties provide the actual touch points generating the pinch.

• point1 and point2 hold the current positions of the points.
• startPoint1 and startPoint2 hold the positions of the points when the second point was touched.